Build error for moxiebox architecture

[Chris Packham]

Hi All,

I'm getting the next crosstool-ng release together and one build
failure we're having is for the moxiebox architecture:

moxie-unknown-moxiebox/lib/libc.a(libc_a-closer.o): in function `_close_r':
moxie-unknown-moxiebox/src/newlib/newlib/libc/reent/closer.c:47:
undefined reference to `_close'

and similar for _lseek, _read, _write and _sbrk

We're currently using the 4.3.0.20230120 snapshot which fails. The
older 4.2.0.20211231 succeeds (as an aside is there a convenient way
to map those snapshot versions to particular tags in the newlib-cygwin
git repo?).

Does that failure ring any bells for anyone?